20123003142 has 24 divisors (see below), whose sum is σ = 47563462440. Its totient is φ = 6097879680.

The previous prime is 20123003129. The next prime is 20123003149. The reversal of 20123003142 is 24130032102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123003149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50815467 + ... + 50815862.

It is an arithmetic number, because the mean of its divisors is an integer number (1981810935).

Almost surely, 2^20123003142 is an apocalyptic number.

20123003142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20123003142 is an abundant number, since it is smaller than the sum of its proper divisors (27440459298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123003142 is a wasteful number, since it uses less digits than its factorization.

20123003142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101631348 (or 101631345 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20123003142 its reverse (24130032102), we get a palindrome (44253035244).

The spelling of 20123003142 in words is "twenty billion, one hundred twenty-three million, three thousand, one hundred forty-two".